executeApplicationScript.js

executeApplicationScript: function(message, sendReply) {
  for (var key in message.inject) {
    window[key] = JSON.parse(message.inject[key]);
  }
  loadScript(message.url, sendReply.bind(null, null));
}

function loadScript(src, callback) {
  var script = document.createElement('script');
  script.type = 'text/javascript';
  script.src = src;
  script.onload = callback;
  document.head.appendChild(script);
}